Blockchain.com wallet is a noncustododial web wallet, but a wallet that require email is not a recommendable wallet
I haven't ever had blockchain.com, but I guess that it keeps your private keys on their database. How's that non-custodian?
The mempool is so congested right now, but it is as a result of miners that are not mining in China due to blackout, if they still not yet continue to mine, the mining difficulty will still be adjusted, and the feerate will be reduced.
That's true. Unfortunately, difficulty re-adjusted on April 15th (block 679,392) and thus, we'll have to wait 'til block 681,408. At the moment it's 1,221 blocks away...